Damper.



No. 684,270. Patented Oct. 8, I90]. 0. F. KUBNREICH.

D A M P E R (Application filed Oct. 2, 1899.]

(No Model.)

I nventor.- F? ZQMQMQWZJ Witnesses.

Attorney m: nouns Him: ob. wcnduwa. wumne-ro UNITED STATES PATENTOFFICE.

OTTO F. KORNREIOH, OF MILW'AUKEE, WISCONSIN, ASSIGNOR OF ONE-HALF TO THEPHILIP GROSS HARDW'ARE COMPANY, OF SAME PLACE.

DAMPER.

srnclricacriolv forming part of Letters Patent No. 684,270, datedOctober s, 1901.

Application filed October 2, 1899.

To all whom it ma concern: Y

I Be it known that I, OTTO F. KORNREICH, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements in Dampers, ofwhich the following is a specification.

My invention relates to improvements in dampers for furnace-pipes.

The object of my invention is to provide a damper which will besubstantially air-tight under the light pressure exerted by theaircurrents in an ordinary furnace-pipe, regard being had forconvenience in inserting the 'damperbetween the abutting ends of thepipesections and for freedom of movement, frictional contact between theperiphery of the damper and the interior of the pipe-sections beingavoided.

In the following description reference is had to the accompanyingdrawings, in which' Figure 1 is a side view of the abutting ends of twosections of furnace-pipe, showing my invention applied thereto. Fig. 2is a cross? section of the furnace-pipe, showing the damper as seen fromthe upper side. Fig. 3 is a central longitudinal sectional view of thepipesections and damper. Fig. 4 is an enlarged detail view of a portionof the damper disk or valve and the dampenengaging flange, showing thetongue-and-groove joint. Fig. 5 is a top view showing the furnace-pipesand the damper-ring in section on the axis of the damper.

Like parts are identified by the same reference-letters throughout theseveral views.

A A are the abutting ends of two furnacepipe sections.

B is the damper-ring. This is provided with an exterior flange 0, whichforms an annular shoulder against which the ends of the pipe-sections Aare adapted to engage, the ring B being formed to fit within thepipesections, as shown in Fig. 1.

D is the damper valve or disk, which is preferably pivoted to turn upona horizontal axis E and is provided with a weight F, adapted to closethe damper automatically when the latter is not held in its openposition by the damper-actuating lever G.

It will be observed, Fig. 3, that the diskD Serial ITO-732,276. (N0model.)

when closed occiipies a slightly-diagonal po sition in the pipe,wit hits periphery engaging against the interior sector-flanges H H, whichproject inwardly from the ring 13 on opposite sides, respectively; ofthe axis E of the disk and on opposite sides of the disk when closed.The flanges H H also have a diagonal trend corresponding with that ofthe disk when closed, as shown in said Fig. 3. It will also be observedthat the disk is provided near its periphery with a groove I, into whicha corresponding tongue or rib J is adapted to project, as best shown inFig. 4, the effect of this construction being to produce an extremelytight joint, so that the periphery of the disk need not be made-tocontact with the ring in order to prevent the passage of air. It istherefore evident that the weight can be relied upon to close the diskunder all circumstances, as all frictional contact between the peripheryof the disk and the damper-ring is avoided.

Owing to the fact that furnace-pipes are usually located in anearlyhorizontal position, it is customary where ordinary dampers areused to provide exterior weighted levers for closing them, which leversare arranged at an angle to the plane of the damper valve or disk inorder that they may exert an effective pressure when the disk is in itsvertical or closed position. By the use of diagonal sectorflanges,however, I am enabled to use the interior weight F on the face of thedisk, for the disk itself occupies an angular position when closed suchas to render the weight effective.

For convenience in inserting the disk in position I have provided thesame with axial studs or trunnions K and L, which may be formedintegrally with the disk itself. The trunnion K is adapted to beinserted in an apertured bearing in the ring B, While the trunnion L(which is provided with the actuating-lever G) is adapted to engage inan open slot or recess M, formed in the ring B, the trunnion being heldin position by the abutting end of one of the pipe-sections A. With thisconstruction it is obvious that the disk can be readily removed from thepipe by first removing the section A, which covers the slot M, whereuponthe disk may be tilted to withdraw the trunnion L from the slot, whenthe trunnion K may also be readily withdrawn from its apertured bearingin the ring.

It will of course be understood that my damper is adapted to be used notonly in the hot-air service-pipes, but also in cold-air flues,vent-fines, &c.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- A damper, comprising a ring adapted toengage the ends of abutting furnace-pipe sections; inwardly projecting,diagonally disposed sector-flanges, arranged to occupy positions onopposite sides of the damper Valve, or disk, when the latter is closed,and to furnish a segmental bearing therefor; a damper valve or diskaxially supported intermediate of said sector-flanges, said valve ordisk and sector-flanges being provided with tongued or grooved surfacesadapted to register with each other when the disk is closed; and aWeight connected with the damper-valve, and adapted to hold the valvenormally in closed position.

In testimony whereof I affix my signature in the presence of twowitnesses.

OTTO F. KORNREIOH. Witnesses:

JAS. B. ERWIN, LEVERETT 0. WHEELER.

